Method of making warp beam head clamp pads



Aug. 39, 1949. BERGSTROM 2,480,214

METHOD OF MAKING WARP BEAM HEAD CLAMP PADS Filed May 10, 1945 I P I I z FIQT J M, k l 1 1, n

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[NJ/5 NTOR Patented Aug. 30, 1949 UNITED STATES PATENT OFFICE METHOD OF MAKING WARP BEAM HEAD CLAMP PADS Application May 10,

9 Claims. 1

This invention relates to improvements in warp beams such as are used in looms and it is the general object of the invention to provide the beam with an improved warp head so constructed that it can be clamped firmly in position on the beam barrel.

The warp for looms is customarily Wound on a large beam located at the back of the loom and rotatably mounted so that it can unwind warp as the latter is consumed .in the weaving operation. The width of the warp beam will bear a close relation to the width of the finished cloth, and where the same loom is used for weaving cloths of different widths it is necessary to adjust the beam heads so that a corresponding change can be made in the width of the warp. The heads are ordinarily located at the ends of the beam barrel and made so that they can either slide along or turn around the barrel for adjusting purposes.

It is an important object of my present invention to provide a beam head with a pressure foot or pad which can be clamped tightly against the beam barrel for the purpose of holding the beam head in adjusted position. The pad is attached to a screw which turns in a part of the beam head for the purpose of moving the pad toward and from the beam barrel.

It is desirable that the pad have that part thereof which engages the barrel concentric with the latter and in order to achieve this result it is another object of my invention to provide an improved method for making the beam head wherein the pad is originally integral with the head and is formed as part of the head hub. The hub and pad are then turned or threaded to fit the end of the barrel, after which the pad is cut away from the hub and is fitted with the aforesaid screw by means of which it can be forced tightly against the beam barrel.

The improved method also contemplates the provision of a beam head formed originally with an integral lug located adjacent to the pad so that the drilling operation preparatory to cutting the threads for the reception of the screw can be done while the lug and pad are in fixed position on the head. In this way assurance is given that the tapped holes for the ends of the screw will be in alignment and after the pad is cut from the head it will have the same relationship with respect to the head so far as its concentricity and alignment are concerned as it had prior to the cutting operation.

With these and other objects in view which will appear as the description proceeds, my in- 1945, Serial No. 593,034

2 vention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein two forms of the invention :are shown,

Fig. 1 is afront elevation of a warp beam having attached thereto warp heads made according to the preferred form of my invention,

Fig. 21s a side elevation on a reduced scale of one of the heads looking in the direction of arrow 2, Fig. 1, with the head and pad separated and ready for use,

Fig. 3 is an enlarged detailed vertical section on line 3-3 of 2,

Fig. .4 is .an enlarged elevation showing the pad and adjusting screw as seen when looking in the direction of arrow 4. Fig. 3,

Figs. 5, 6, 7 and 3 are diagrammatic views settim forth successive steps in the manufacture of the head, and

Fig. 9 is a detailed sectional view on an enlarged scale similar to the lower part of Fig. 3 but showing a modified form of the invention.

As shown in Fig. l the beam head comprises a barrel in on which the warp is wound. This 25 barrel in the preferred form is provided with external V-shaped screw threads 1-] and I2 on the ends thereof on which are threaded right and left warp heads l3 and I4. Supporting gudgeons extend from opposite ends or the barrel and 30 afford means by which the beam can be rotatably mounted in either a winding machine or a loom. Since the warp heads l3 and M are identical a detailed description will be given of only one of them.

Warp head 14 is provided with a flange the tplane of which is perpendicular to the axis of the barrel Ill. This flange has formed integral therewith a hub 2! extending alon the barrel i0 and reinforced by ribs 22 integral with the "$0 hub and flange. A web or lug 23 extends between two of the ribs 22 and projects outwardly from the flange N, that is, to the left as viewed in Fig. l. .A pressure pad 24' is provided for the purpose of holding the head firmly in adjusted 45 position along the barrel to. This pad extends into an open space 25 below the lug 23 and between the adjacent reinforcing ribs 22 and passes through the flange 20. p

The method of making the head is indicated to in Figs. 5 to 8. In its original form the head will have the pad 24 formed integral with the hub 2-]. The hub is then turned and in this operation the inner pressure exerting surface of the pad is made concentric with the inner bear- 55 has surface 31 oi the hub. The hub is then threaded as indicated at 32, these threads being cut into the surface 30 of the pad 24 and matching threads l2. Upon completion of this part of the operation, indicated in Fig. 5, that part of the pad which will be ultimately used to exert pressure on the barrel IE3 is concentric with the bearing surface 3| of the hub and has screw threads extendingthereacross which are continuations of the screw threads on the hub.

The next step of the operation is indicated in Fig. 6. Holes 35 and 36 are drilled through the lug 23 and pad 25, respectively, while the latter is still connected to the head l4. These two holes are therefore in alignment, and'this alignment is established while the surface 30 .of the pad is still formed as a continuation of surface 3|.

In the next step in the making of the beam head the pad 25 is cut away from the hub along the lines a and 1), see Fig. 6, and is then removed from the head. The open space 25 facilitates this cutting operation. The lug 23 and adjacent parts of the beam are now as shown in Fig. '7, and hole 35 can be tapped preferably with a right hand thread as at 31. The hole 36 is tapped as at 38 in a separate operation, see Fig. 8, but its threads ar preferably left hand.

A screw 40 having upper right hand threads 3i and lower left hand threads 42 and having an intermediate head 43 is then threaded'into the lug and pad. With the pad loose the head M will be turned on to the screw l2 until it has reached the desired position along the length of the barrel, after which the screw 40 will be turned by means of a wrench not shown applied to the head 43-. After the proper amount of turning of screw 40 the pad will assume the position shown in Fig. 2 with its surface 38 concentric with the axis of the barrel l and on the same radius as the bearing 3| of the hub 2|. The fact that the holes 35 and 36 were drilled as already described insures this relationship of the surfaces 30 and 3!, and insures close contact between the head and barrel. The screw threads l2 fit accurately into the threads cut on the surfaces 31 and 30 because of the method of manufacture set forth hereinbefore, and the pad can therefore exert sufficient pressure to hold the head l4 firmly in position on the barrel. 7

In the preferred form of the invention the threads l2 and IS on the barrel and 32 on the hub and pad are made as V-threads and the threads 32 are cut for the full width of the hub and pad. When the heads [3 and [4 are of large diameter and are relatively heavy it is desirable to be able to support the head on the barrel before the threads of the hub engage the threads on the barrel. In order to accomplish this result the form of the invention shown in Fig. 9 is employed; The procedure described in connection with the preferred form of the invention will in general be employed in making the modified form of the invention, except that the hub and pad will be undercut as at 50, the undercut having a diameter sufficiently large to fit over the flat top screws cut on the barrel 52 which is otherwise similar to barrel It). This undercut is located near a flange 53 similar to flange 20, and the screw threads cut on the hub and pad will have flat tops as at 54. When assembling the head shown in Fig. 9 the undercut will be slipped over the end of the barrel and afford a support for the head before the latter is turned to draw its threads 54 along the threads 5| of the barrel.

From the foregoing it will be seen that I- have provided a warp beam having a warp head provided with a pressure pad the barrel engaging surface of which is truly concentric with the surface 31 which fits closely over the end of the barrel It. It will also be seen that by a simple turning of the screw 40 the pad can be forced tightly against the barrel head. Furthermore, the method of manufacturing the head involves the steps of first forming the pad 24 integral with the head, providing it with a barrel engaging surface concentric with the surface 3! of the hub 23, drilling the holes 35 and 36 in alignment with each other, cutting the pad away from the head, tapping the holes 35 and 36 as described and thereafter utilizing the screw 40 to effect radial adjustment of the pad with respect to the axis of the head. By this method of manufacture the pad can be forced very tightly against the barrel l0 with that part of the pad engaging the barrel concentric with the latter. This last concentricity grows out of the closeness of fit between the barrel end and the hub 2|. I do not wish to be limited to the exact procedure described hereinbefore with respect to the holes 35 and 36. Thus, hole 35 can be tapped before the pad is cut away from the barrel, see Fig. 6, and if desired the hole 36 can be made somewhat smaller in diameter than the hole 35 and tapped before the pad is cut from the head. It should be obvious also that instead of using right and left threads as described for the screw 40, the same general result will be obtained if the threads 4! and 42 are both of the same hand but of different pitch.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. The method of making a beam head for a warp beam having a barrel, said method consisting of the following steps: forming the head with a hub and a flange integral therewith having an open space therein across which extends a pad integral with the hub, boring the hub and pad to 'T provide a bearing surface to fit the barrel so that the bearing surface of the pad will be concentric with the bearing surface of the hub, thereafter separating the pad from the hub and beam head by cuts extending from the interior of the hub into said open space, and then mounting the pad on the beam, so that the bored surface of the pad will be concentric with the bored hub.

2, The method of making a beam head for a warp beam having a cylindrical barrel, said method consisting of the following steps: forming the beam head with a hub and a flange integral therewith having an open space therein across which extends a pad integral with the hub, boring the hub and pad to form a. continuous cylindrical bearing surface thereon to fit the barrel, thereafter separating the pad from the hub by cuts extending from the interior of the hub into said open space, and then mounting the pad on the beam head for movement relatively to the latter toward and from the axis of the hub and in such manner that the bearing surface on the pad is concentric with the axis of the hub.

3. The method of making a beam head for a warp beam having a cylindrical barrel, said method consisting of the following steps: forming the beam head with an integral hub and friction pad, borin the hub and pad to provide a continuous cylindrical bearing to fit the barrel, cutting the pad away from the hub and beam head, providing the pad with a tapped hole trans verse of the bearing surface thereof, and mounting the pad on the beam head by a screw threaded into part of the beam head and also threaded into the tapped hole, whereby the pad can be moved toward and from the axis of the hub.

4. The method of making a beam head for a warp beam having a barrel, said method consisting of the following steps: forming the beam head with a hub, friction pad and lug all integral with the head, boring the hub and pad to provide a continuous bearing to fit the barrel, drillin the lug and pad in a radial direction with respect to the axis of the hub to provide ali n ol n the lug and pad, thereafter cutting the pad away from the hub, and making provision by means extending into the aligned holes for moving the pad toward and from the axis of the hub.

5. The method of making a beam head for a Warp beam having a barrel, said method consisting of the following steps: forming a beam head with a hub, friction pad and lug all integral therewith, boring the hub and pad to provide a surface to fit closely over the barrel, boring aligned holes through the lug and pad extending in a direction radial with respect to the axis of the hub, cutting the pad from the hub, tapping the holes in the lug and the pad, and inserting a screw member in the tapped holes for the purpose of moving the pad toward and from the axis of the hub when the screw member is turned.

6. The method of making a beam head for a warp beam having a barrel, said method consisting of the following steps: forming a beam head with a hub, friction pad and lug all integral therewith, boring the hub and the pad to provide a bearing surface to fit the barrel, drilling aligned holes in the lug and pad, cutting the pad from the hub, tapping right hand screw threads in the lug and left hand screw threads in the pad, and fitting a screw haVlng right and left hand threads into the tapped holes in the lug and pad for the purpose of moving the pad toward and from the axis of the hub when the screw is turned.

7. The method of forming a beam head for a warp beam having a barrel the end of which is threaded, said method consisting of the following steps: forming the beam head with a hub and a flange integral therewith having an open space therein across which extends a pad integral with the hub, cutting internal screw threads on the hub and pad to fit the screw threads of the barrel, thereafter separating the pad from the hub by cuts extending from the interior of the hub into said open space, and then mounting the pad on the beam head for movement toward and from the axis of the hub.

8. The method of making a beam head for a warp beam having a barrel, said method consisting of the following steps: forming a beam head with a hub and a flange integral therewith having an open space therein across which extends a pad integral with the hub, finshing the interior of the hub and pad to provide said hub and pad with the surf-ace which will fit the barrel, thereafter separating the pad from the hub by cuts eXtending from the interior of the hub into said open space, and then mounting the pad on the beam head for movement toward and from the axis of the hub.

9. The method of fitting a beam head on a warp beam having a barrel, said method consisting of the following steps: providing a beam head with a hub and a pad integral therewith, finishing the interior of the hub and pad to provide a bearing surface to fit the barrel, undercutting the finished surface on the hub and pad to provide a cylindrica1 surface having a diameter somewhat greater than the diameter of the barrel, cutting the pad from the hub, mountin the pad on the beam head for movement toward and from the axis of the hub with the undercut part of the pad registering with the undercut part of the hub, and thereafter fitting the undercut part of the hub and pad over the end of the barre1 preparatory to longitudinal movement of the beam head along the barrel.

CARL P. BERGSTROM.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,558,477 Schmidt Sept. 16, 1924 1,816,503 Uft July 28, 1931 1,915,233 Leinbach June 20, 1933 2,025,924 Wing Dec, 31, 1935 2,102,020 Mossburg Dec. 14, 1937 2,153,035 Burt Apr. 4, 1939 2,280,270 Stoner Apr. 21, 1942 

